Amphioxi populated the oceans about 550 million years ago
A note for The Half-Lesson, "Your Brain Is Not for Thinking," in Lisa Feldman Barrett.
Some context from page 1 is:
Amphioxi populated the oceans about 550 million years ago, and they lived simple lives.
Amphioxi are our evolutionary cousins.... [They] lack all sorts of features that distinguish vertebrates from invertebrates.
To learn how vertebrates developed eyes and ears and so on, see Neil Shubin’s informative and easy-to-read telling of the evolutionary story.
- Bertrand, Stephanie and Hector Escriva. 2011. “Evolutionary Crossroads in Developmental Biology: Amphioxus.” Development 138 (22): 4819–4830.
- Cisek, Paul. 2019. "Resynthesizing behavior through phylogenetic refinement." Attention, Perception and Psychophysics 81 (7): 2265–2287.
- Gee, Henry. 2018. Across the Bridge: Understanding the Origin of the Vertebrates. Chicago, IL: University of Chicago Press.
- Lacalli, Thurston C. 2004. “Sensory Systems in Amphioxus: A Window on the Ancestral Chordate Condition.” Brain, Behavior and Evolution 64 (3): 148–162.
- Lacalli, Thurston C. 2008. “Basic Features of the Ancestral Chordate Brain: A Protochordate Perspective.” Brain Research Bulletin 75 (2-4): 319–323.
- Lacalli, Thurston C. 2018. "Amphioxus neurocircuits, enhanced arousal, and the origin of vertebrate consciousness." Consciousness and Cognition 62:127–134.
- Striedter, Georg F., and R. Glenn Northcutt. 2020. Brains Through Time: A Natural History of Vertebrates. New York: Oxford University Press.
- Wicht, Helmut and Thurston C. Lacalli. 2005. “The Nervous System of Amphioxus: Structure, Development, and Evolutionary Significance.” Canadian Journal of Zoology 83 (1): 122–150.
- Shubin, Neil. 2008. Your Inner Fish: A Journey Into the 3.5-Billion-Year History of the Human Body. New York: Pantheon.